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Cheap flights from Knoxville to Lisbon from $638

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Knoxville to Lisbon departing on 1/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Knoxville to Lisbon

Cheap round-trip flights

United Airlines Logo
10:16 am - 9:20 amTYS-LIS
18h 04m2 stops
United Airlines Logo
11:20 am - 10:33 pmLIS-TYS
40h 13m2 stops
$638United Airlines
Find Deal
Wed, Jan 7 - Sat, Jan 17
Air Canada Logo
5:50 am - 9:20 amTYS-LIS
22h 30m2 stops
Air Canada Logo
11:20 am - 6:42 pmLIS-TYS
36h 22m2 stops
$639Air Canada
Find Deal
Wed, Jan 7 - Sat, Jan 17
United Airlines Logo
8:50 am - 8:20 amTYS-LIS
18h 30m2 stops
United Airlines Logo
5:00 am - 8:20 pmLIS-TYS
20h 20m2 stops
$648United Airlines
Find Deal
Fri, Oct 24 - Tue, Nov 4
British Airways Logo
11:03 am - 6:55 amTYS-LIS
14h 52m1 stop
British Airways Logo
10:30 am - 8:43 pmLIS-TYS
15h 13m1 stop
$650British Airways
Find Deal
Wed, Jan 7 - Sat, Jan 17
United Airlines Logo
7:00 am - 10:15 amTYS-LIS
22h 15m2 stops
United Airlines Logo
5:00 am - 7:29 pmLIS-TYS
19h 29m2 stops
$653United Airlines
Find Deal
Thu, Dec 4 - Wed, Dec 10
British Airways Logo
11:03 am - 6:55 amTYS-LIS
14h 52m1 stop
British Airways Logo
10:30 am - 8:43 pmLIS-TYS
15h 13m1 stop
$655British Airways
Find Deal
Wed, Jan 7 - Sat, Jan 17
American Airlines Logo
7:56 am - 6:55 amTYS-LIS
17h 59m1 stop
American Airlines Logo
10:30 am - 11:45 pmLIS-TYS
18h 15m2 stops
$659American Airlines
Find Deal
Wed, Jan 7 - Sat, Jan 17
Logo
7:15 am - 5:30 amTYS-LIS
17h 15m1 stop
Logo
12:05 pm - 11:55 amLIS-TYS
27h 50m2 stops
$685
Find Deal
Fri, Oct 24 - Thu, Oct 30
Logo
7:15 am - 5:30 amTYS-LIS
17h 15m1 stop
Logo
6:45 pm - 11:55 amLIS-TYS
21h 10m1 stop
$733
Find Deal
Fri, Oct 24 - Thu, Oct 30
American Airlines Logo
7:00 am - 9:05 amTYS-LIS
21h 05m1 stop
American Airlines Logo
11:05 am - 8:44 pmLIS-TYS
13h 39m1 stop
$885American Airlines
Find Deal
Sun, Oct 12 - Tue, Oct 28

United Airlines flights from Knoxville to Lisbon

Our best United Airlines deals on Knoxville to Lisbon flight tickets
United Airlines
Jan 7
TYS10:16 amKnoxville McGhee Tyson
18h 04m
2 stops
LIS9:20 amLisbon Humberto Delgado
Jan 17
LIS11:20 amLisbon Humberto Delgado
40h 13m
2 stops
TYS10:33 pmKnoxville McGhee Tyson
$638
Find similar
United Airlines
Oct 24
TYS8:50 amKnoxville McGhee Tyson
18h 30m
2 stops
LIS8:20 amLisbon Humberto Delgado
Nov 4
LIS5:00 amLisbon Humberto Delgado
20h 20m
2 stops
TYS8:20 pmKnoxville McGhee Tyson
$648
Find similar
United Airlines
Dec 4
TYS7:00 amKnoxville McGhee Tyson
22h 15m
2 stops
LIS10:15 amLisbon Humberto Delgado
Dec 10
LIS5:00 amLisbon Humberto Delgado
19h 29m
2 stops
TYS7:29 pmKnoxville McGhee Tyson
$653
Find similar

American Airlines flights from Knoxville to Lisbon

Our best American Airlines deals on Knoxville to Lisbon flight tickets
American Airlines
Jan 7
TYS7:56 amKnoxville McGhee Tyson
17h 59m
1 stop
LIS6:55 amLisbon Humberto Delgado
Jan 17
LIS10:30 amLisbon Humberto Delgado
18h 15m
2 stops
TYS11:45 pmKnoxville McGhee Tyson
$659
Find similar
American Airlines
Oct 12
TYS7:00 amKnoxville McGhee Tyson
21h 05m
1 stop
LIS9:05 amLisbon Humberto Delgado
Oct 28
LIS11:05 amLisbon Humberto Delgado
13h 39m
1 stop
TYS8:44 pmKnoxville McGhee Tyson
$885
Find similar
American Airlines
Sep 24
TYS7:18 amKnoxville McGhee Tyson
20h 47m
1 stop
LIS9:05 amLisbon Humberto Delgado
Oct 2
LIS11:05 amLisbon Humberto Delgado
15h 09m
1 stop
TYS9:14 pmKnoxville McGhee Tyson
$1,015
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Knoxville to Lisbon that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 21, 2025.
Use the filters below to find and compare flights from Knoxville to Lisbon that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 1/7

10:16 am-9:20 am

2 stops18h 04m

Lisbon Humberto Delgado

Sat 1/17

11:20 am-10:33 pm

2 stops40h 13m

$638

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 1/7

5:50 am-9:20 am

2 stops22h 30m

Lisbon Humberto Delgado

Sat 1/17

11:20 am-6:42 pm

2 stops36h 22m

$639

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Fri 10/24

8:50 am-8:20 am

2 stops18h 30m

Lisbon Humberto Delgado

Tue 11/4

5:00 am-8:20 pm

2 stops20h 20m

$648

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 1/7

11:03 am-6:55 am

1 stop14h 52m

Lisbon Humberto Delgado

Sat 1/17

10:30 am-8:43 pm

1 stop15h 13m

$650

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Thu 12/4

7:00 am-10:15 am

2 stops22h 15m

Lisbon Humberto Delgado

Wed 12/10

5:00 am-7:29 pm

2 stops19h 29m

$653

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 1/7

11:03 am-6:55 am

1 stop14h 52m

Lisbon Humberto Delgado

Sat 1/17

10:30 am-8:43 pm

1 stop15h 13m

$655

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 1/7

7:56 am-6:55 am

1 stop17h 59m

Lisbon Humberto Delgado

Sat 1/17

10:30 am-11:45 pm

2 stops18h 15m

$659

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Fri 10/24

7:15 am-5:30 am

1 stop17h 15m

Lisbon Humberto Delgado

Thu 10/30

12:05 pm-11:55 am

2 stops27h 50m

$685

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Fri 10/24

7:15 am-5:30 am

1 stop17h 15m

Lisbon Humberto Delgado

Thu 10/30

6:45 pm-11:55 am

1 stop21h 10m

$733

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sun 10/12

7:00 am-9:05 am

1 stop21h 05m

Lisbon Humberto Delgado

Tue 10/28

11:05 am-8:44 pm

1 stop13h 39m

$885

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Lisbon from

How to get the cheapest flight ticket from Knoxville to Lisbon

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Knoxville and Lisbon?

What is the cheapest month to fly to Lisbon?

In general, January is the cheapest month to fly from Knoxville to Lisbon. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $629. If you are unable to visit Lisbon during the month of January, then departing from Knoxville during the month February is also very affordable. Most momondo users find prices during this month for around $638.

What is the cheapest day to depart on your flight to Lisbon?

Our data shows that Monday is the least expensive day to fly to Lisbon. Tickets to fly out on this day can be as low as $819. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Knoxville to Lisbon for around $1,534.

What is the cheapest time of day to depart on your flight to Lisbon?

The cheapest time of day to fly to Lisbon is in the morning when flights can be purchased for as low as $745. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,134 on average. Flights to Lisbon from Knoxville in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Can stopping save me money on Knoxville to Lisbon flights?

You could potentially save up to 57% on your flight if you consider stops on a Knoxville to Lisbon flight.

When to book flights from Knoxville to Lisbon

Are you open to changing your travel dates? Check out the ideal times to fly from Knoxville to Lisbon according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Knoxville to Lisbon (TYS to LIS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Knoxville to Lisbon

Direct flights

None
There are no direct flights from Knoxville to Lisbon. There are no popular flight routes from Knoxville to Lisbon.
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  • How far is Knoxville McGhee Tyson to Lisbon Humberto Delgado by plane?

    Lisbon Humberto Delgado is 3990.0 mi away from Knoxville McGhee Tyson. 9h 55m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?

    Prices for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport are updated daily.

  • How many operators does momondo search for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?

  • How old do you have to be to fly from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport.

  • What documentation or ID do you need to fly to Lisbon Humberto Delgado Airport?

    The required travel and health documents for your Lisbon Humberto Delgado Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lisbon Humberto Delgado Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Knoxville to Lisbon?

Best airlines flying from Knoxville to Lisbon

Compare and see reviews for airlines that fly from Knoxville to Lisbon with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $580Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
British AirwaysPriceFrom $589Free CancellationRating
6.7
7,291 reviews
Search British Airways flights
United AirlinesPriceFrom $603Free CancellationRating
7.4
8,930 reviews
Search United Airlines flights

Traveling to a place near Lisbon?

Book flights to Lisbon if you plan to visit one of these locations
Sintra
Fátima
Nazaré
Ericeira
Setúbal
Oeiras
Almada
Peniche
Evora
Sesimbra
Estoril
Leiria
Figueira da Foz
Tomar
Zambujeira do Mar
Torres Vedras
Batalha
Óbidos
Comporta
Costa da Caparica

Why use momondo?

Why should I use momondo to find a flight deal from Knoxville to Lisbon?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Knoxville to Lisbon. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Knoxville to Lisbon with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Knoxville to Lisbon flights to just show those with flexible booking policies.

How can momondo help me find flights from Knoxville to Lisbon?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Lisbon from Knoxville.

I’m not ready to book a flight from Knoxville to Lisbon right now. Can momondo alert me if prices change?

Price alerts on flights to Lisbon from Knoxville are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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